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Do I need meth to run a 3.2 on a 5.3?

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Old 03-14-2012, 09:45 AM
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formerly NORTH TEXAS TBSS, then slowgibbs, and now back to NORTH TEXAS TBSS :) (2012-05-27)
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Default Do I need meth to run a 3.2 on a 5.3?
About to change from the stock 3.6 to a 3.2... I've been told I should see 8-9psi? Do I need meth? This is my dd.

Thanks, Nathan
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Old 03-14-2012, 04:10 PM
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As long as the tune is safe and the gas is good around you, then no. Meth as a safety net is IMO, imprudent.
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Old 03-14-2012, 06:06 PM
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Ought to add 3 to 4 psi. Assuming some type of Maggie supercharger, no belt slip, and no changes other than the pulley.
Last edited by old motorhead; 03-14-2012 at 06:16 PM.
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Old 03-14-2012, 08:04 PM
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You will be fine without meth. Make sure your crank is pinned.
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Old 03-14-2012, 08:07 PM
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Yep, no problem. I ran a 2.9 on the Maggie tune on my 5.3 and never heard a ping with premium gas.
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Old 03-14-2012, 08:15 PM
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I have a gauge for that
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Nah you will be fine.
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Old 03-14-2012, 08:19 PM
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Just so you know, I will be running a 2.6 with a 10% over drive crank pulley this year.
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Old 03-14-2012, 08:36 PM
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May not "need" it but itd be safer to have it
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Old 03-15-2012, 10:45 AM
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Originally Posted by Gadgetized
Just so you know, I will be running a 2.6 with a 10% over drive crank pulley this year.
Nice! Stock bottom end 5.3? Your mod list is very similar to what I wanna do with mine.. Is the pinned crank a must at 400ish rwhp? Will I see a boost increase with long tubes?
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Old 03-15-2012, 11:15 AM
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Originally Posted by slowgibbs
Is the pinned crank a must at 400ish rwhp? Will I see a boost increase with long tubes?
Its a good idea to pin the crank either way. Decrease in boost with long tubes.
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